Document name: Maintenance & Operational Procedures for the control of Legionella, water hygiene, ‘safe’ hot water, cold water, drinking water and non-drinking water. Document type



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Procedure:

DOMESTIC COLD WATER TANK MAINTENANCE RECORD SHEET

Frequency:

Annually

Acceptance date:

Oct’12

File & Form Ref:

C - LEG07 [page 4 of 6]

Next review date:

Oct’14

The Authoised Person [Water] has responsibility for reviewing sample results. These should be reviewed against the parameters detailed on pages 4 & 5 of this form, the results should then attached to this form and filed in 3.2. Where results do not comply with the action regime table record your action in the ‘ACTION TAKEN’ column when trying resolve and set up an incident report form.


Location of outlet

Unique Sample ID reference

Type of water

(DHW / CWS)

Results attached to record sheet

(Yes / No)

Results reviewed by (name)

Results acceptable

(Yes / No)*

Action Taken





CONTROL

MAINS COLD






































































































































































































































































































































































































































































I, the undersigned, have reviewed the sample results and attached them to this form. Any action necessary needs to be recorded on an Incident Report and filed in 1.5:

Competent Person


Name:

Signature:

Date:

Authorised Person [Water]


Name:

Signature:

Date:

Additional docket numbers issued:




Procedure:

DOMESTIC COLD WATER TANK MAINTENANCE RECORD SHEET

Frequency:

Annually

Acceptance date:

Oct’12

File & Form Ref:

C - LEG07 [page 5 of 6]

Next review date:

Oct’14

Occupant Susceptibility Category:

Sample Required:

Where from:

Count above which action required:

Required action:

VERY HIGH

(Renal Dialysis, Cancer, AIDS, Respiratory Illness, Imuno-compromised, Elderly)


LEGIONELLA

(species and numbers)


Representative outlets as agreed with the consultant (specify)


>20

a) If limited outlets or count 20-40 = Re-sample at once, and disinfect if repeated again.

b) If more than 20% of outlets or counts 40+ disinfect at once, and review procedures.

TVC, E.coli, coliforms

Representative outlets as agreed with the consultant (specify)


TVC = >100

E.coli = >0

Coliforms = >0
a) If limited outlets give TVC counts of 100-500 then re-sample at once. If similar results from second sample then disinfect tank and system.

b) If more than 20% of outlets give TVC counts 100+ disinfect at once, and review procedures.

c) If TVC results give counts >500 sample the mains cold water unit a clear result is achieved. Then sample the cold water storage tanks, if these results are clean then no further action. If the results are returned positive then clean the cold water storage tank.

d) If any outlet returns E.coli or coliforms of >0 disinfect.

SIGNIFICANT

(All other Healthcare areas)


LEGIONELLA

(species and numbers)


1 MCW

1 of each Tank

2 TCW taps

2 DHWS taps
>100

>1000


Re-sample. Disinfect if fail.
Disinfect at once and review systems.

TVC, E.coli, coliforms

1 MCW

1 of each Tank

2 TCW taps

2 DHWS taps
TVC = >100

E.coli = >0

Coliforms = >0


a) If limited outlets give TVC counts of >100 = Re-sample at once, and disinfect if repeated again.

b) If more than 40% of outlets give TVC counts 100+ disinfect at once, and review procedures.

c) If TVC results give counts >500 sample the mains cold water unit a clear result is achieved. Then sample the cold water storage tanks, if these results are clean then no further action. If the results are returned positive then clean the cold water storage tank.

d) If any outlet returns E.coli or coliforms of >0 disinfect.



Procedure:

DOMESTIC COLD WATER TANK MAINTENANCE RECORD SHEET

Frequency:

Annually

Acceptance date:

Oct’12

File & Form Ref:

C - LEG07 [page 6 of 6]

Next review date:

Oct’14

Occupant Susceptibility Category:

Sample Required:

Where from:

Count above which action required:

Required action:

LOW

(e.g. staff areas)


LEGIONELLA

(species and numbers)


1 MCW

1 of each Tank

2 TCW taps

2 DHWS taps
>100

>1000


Re-sample. Disinfect if fail.

Disinfect at once and review systems.

TVC, E.coli, coliforms

1 MCW

1 of each Tank

2 TCW taps

2 DHWS taps
TVC = >150

E.coli = >0

Coliforms = >0


a) If limited outlets give TVC counts of >120 = Re-sample at once, and disinfect if repeated again.

b) If more than 40% of outlets give TVC counts 120+ disinfect at once, and review procedures.

c) If TVC results give counts >500 sample the mains cold water unit a clear result is achieved. Then sample the cold water storage tanks, if these results are clean then no further action. If the results are returned positive then clean the cold water storage tank.

d) If any outlet returns E.coli or coliforms of >0 disinfect.


(*) These are for guidance. The risk assessment will indicate need to disinfect as a combination of factors is to be considered.


PPM:

SENTINEL OUTLET MONTHLY TEMPERATURE [MIXED & NON MIXED]

PPM Ref:

C – LEG39

Frequency:

Monthly

1) Check the incoming mains cold water temperature to ensure it is <20OC.


2) Run the cold water outlet at a moderate flow rate (do not fully open) and take the temperature to ensure it is <20OC within two minutes of running the outlet.
3) Run the hot water outlet at a moderate flow rate (do not fully open) and take the temperature to ensure it is at least 55OC within one minute of running the outlet. Those outlets with an electric water heater such as:


  • Instantaneous water heaters (i.e. no storage)

  • Point of use water heater (limited storage between 5-50 litres)

  • Combination water heaters (typical storage capacity between 12 to 150 litres)

With the point of use and combination water type heaters they will operate a storage temperature of 60OC with outlet temperature of at least 55OC. When taking the temperature of these units record the maximum temperature within the minute NB – running these units for a minute and then taking the temperature will exhaust the unit and give false readings.


4) Record all temperatures achieved. Where temperatures do not comply within the required time then keep the tap running and record the time taken to achieve the temperature (up to a maximum of 5 minutes).
5) Where temperatures do not comply investigate possible reasons why. Record your actions in the ‘ACTIONS TAKEN’ column with trying to resolve the non compliance.
NB – If a hot water outlet is supplied by an electric water heater then record the maximum temperature achieved.
RECORD SHEET C – LEG39 MUST BE FILLED IN AND RETURNED TO THE AUTHORISED PERSON [WATER]




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